Transit — how it is calculated
The transit score answers one question: how well is a given address connected to public transit in Sofia? The 0-to-100 score accounts for real departure frequency, the types of transit available nearby, walking distance to stops, and time of day.
What we measure
We evaluate transit accessibility as a combination of three factors: how many stops are within walking distance, how many real departures serve those stops at different times of day, and what type of transit is available. Data comes from the official Sofia GTFS feed.
Transit types
Metro and tram are valued higher than bus — they offer more predictable service and are not affected by traffic. Neighborhoods served only by bus lines with no metro or tram route nearby receive a lower score.
Distance to stops
Stops farther from the address contribute less to the score. We apply a smooth distance decay — a stop at 50 meters weighs significantly more than one at 700 meters. Stops beyond 800 meters are not considered.
Scale 0–100
| Score | Description |
|---|---|
| 90–100 | Exceptional transit access |
| 70–89 | Very good |
| 50–69 | Good — acceptable for daily commuting |
| 30–49 | Limited — relies mostly on bus |
| 0–29 | Poor — highly car-dependent |
What we do not measure
The score does not account for traffic congestion, delays, comfort, or actual service quality beyond the schedule. We do not measure walking routes to a final destination — only accessibility to the transit network.
Data updated monthly. Current version: GTFS Sofia, April 2026.